Papers : IFS - Indian Forest Service Botany Previous Year Paper (II) (2005)

PAPER -II : SECTION A

1. Write short notes on any four of the following in about 150 words each (5 × 10 = 50)
(a) Nucleosome
(b) Male sterility
(c) Chi-square test
(d) Trisomics
(e) One-gene, one-enzyme concept

2. (a) Explain the various methods of transfer of genes. (20)
(b) What is recombinant DNA technology? How is it employed in genetic engineering? (20)

3. (a) With suitable classical experiments on sex-linked inheritance, prove that genes are carried on the chromosomes. (30)
(b) How is sex determined in plants? (10)

4. (a) Explain the regulatory mechanism of gene action in microbes. (20)
(b) What is genetic code? Explain the mechanism of genetic code in the transfer of information from DNA to amino acids. (20)

SECTION B
5. Write short notes on any four of the following in about 150 words each: (5 × 10 = 50)
(a) CAM Pathway
(b) Phytochrome
(c) Gibberellins
(d) Bioindicators
(e) Red Data Books

6. (a) Describe the morphological and biochemical changes accompanying seed germination. (20)
(b) Explain the molecular basis of fruit ripening and show how fruit ripening is manipulated. (20)

7. (a) Explain the physiology of nitrogen metabolism. (20)
(b) Explain the mechanism of photorespiration in plants. (20)

8. (a) Explain the characteristics of various forest types of India. (30)
(b) Explain forests as renewable resources. (10)